1.There is currently no W861 development board available.
2.The reason for NAK prompt is that in most cases, due to unstable serial port connections, some USB to serial port boards do not support high baud rates. If this error persists, you can try reducing the download baud rate.
3.The W806 chip does not have Wi-Fi function.
4.Unable to read firmware file from device.

问 我有几个关于 W806 和 W861 的问题 | I have a few questions about W806 and W861